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'242
SODA
AND
MINERAL
WATERS.
The
acid
gas
for the
impregnation
of
the
water,
is
always
obtained
from
marble
dust
by
the
action
of
sulphuric
acid,
these
Deing
the
cheapest
materials
for
the
purpose.
Chalk
may
also
be
used,
but
is
objec-
tionable
on
account
of
its
communicating
an
unplea-
sant
smell
to
the
carbonic
acid.
When
sulphuric
acid
is
employed,
sulphate
of
lime
is
formed,
which
inter-
feres
with
the
action
of
the
acid,
and
hence
it is
ne-
cessary
to
stir
the
mixture
to
render
the
decomposition
of
the
carbonate
complete.
EFFERVESCING
SARSAPAR1LLA.
Take
a
keg
similar
to
that
mentioned under
the
head
of
Soda
Water,
and
to
every
gallon
of
clean
rain
water,
add
one
pint
of
the
decoction
of
liquorice
root,
which
is
formed
by
boiling
three
ounces
of
the
root
for
one
hour
in
a
pint
of
water,
then
proceed
to
add
to
every
gallon
of
the
water,
white
or
brown
sugar,
one
quarter
of
a
pound
;
oils
of
sassafras
and
aniseed,
of
each,
ten
drops
;
oil
of
wintergreen,
six
drops
;
brandy
coloring
or
burnt
sugar,
one
quarter
of
a
pint
;
infusion
of
ginger,
one
pint.
This
infu-
sion
is
prepared
by
boiling
for
one
hour,
four
ounces
of
bruised
ginger
to
every
pint
of
water,
and
then
straining.
Having
added
to
the
keg
the
water,
the
decoction
of
liquorice
root,
the
sugar
having
first
worked
the
oils
up
well
in
a
small
portion
of
the